syzkaller login: [ 34.077147] BUG: Bad rss-counter state mm:000000004de44b49 type:MM_FILEPAGES val:33 [ 34.078493] BUG: Bad rss-counter state mm:000000004de44b49 type:MM_ANONPAGES val:22 [ 34.121403] ================================================================== [ 34.122430] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.123514] Read of size 8 at addr ffff8880158bfc20 by task sshd/220 [ 34.124285] [ 34.124500] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.125375] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.126369] Call Trace: [ 34.126692] [ 34.126981] dump_stack_lvl+0x91/0xf0 [ 34.127490] print_report+0xcc/0x620 [ 34.127981] ? __virt_addr_valid+0x102/0x340 [ 34.128543] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.129160] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.129780] kasan_report+0xbe/0xf0 [ 34.130267] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.130892] vma_interval_tree_remove+0xc75/0xec0 [ 34.131504] vma_prepare+0xc54/0x11a0 [ 34.131986] __split_vma+0x5af/0x950 [ 34.132466] ? __pfx___split_vma+0x10/0x10 [ 34.132996] ? find_held_lock+0x2c/0x110 [ 34.133512] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.134073] ? lock_is_held_type+0x9f/0x120 [ 34.134616] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.135221] ? mtree_range_walk+0x632/0x900 [ 34.135782] ? mas_walk+0x5c7/0x7c0 [ 34.136251] do_vmi_munmap+0x1f1/0x2b0 [ 34.136739] mmap_region+0x1f9/0x2660 [ 34.137221] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.137731] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.138438] ? __pfx_lock_acquire+0x10/0x10 [ 34.138970] ? __pfx_mmap_region+0x10/0x10 [ 34.139529] ? security_mmap_addr+0x7d/0xa0 [ 34.140064] ? get_unmapped_area+0x1f5/0x3f0 [ 34.140611] do_mmap+0x854/0xf00 [ 34.141054] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.141544] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.142108] ksys_mmap_pgoff+0x3af/0x500 [ 34.142626] do_syscall_64+0x3f/0x90 [ 34.143104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.143762] RIP: 0033:0x7eff3626ed82 [ 34.144217] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 34.146379] RSP: 002b:00007ffefb9d7c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.147314] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff3626ed82 [ 34.148160] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff356a8000 [ 34.149002] RBP: 00007eff356a8000 R08: 0000000000000009 R09: 0000000000001000 [ 34.149844] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb69c40ec0 [ 34.150686] R13: 00007ffefb9d7c20 R14: 00007ffefb9d7c50 R15: 00007ffefb9d7fb0 [ 34.151538] [ 34.151831] [ 34.152044] Allocated by task 213: [ 34.152467] kasan_save_stack+0x22/0x50 [ 34.152970] kasan_set_track+0x25/0x30 [ 34.153460] __kasan_slab_alloc+0x59/0x70 [ 34.153977] kmem_cache_alloc+0x16b/0x370 [ 34.154489] vm_area_dup+0x20/0x160 [ 34.154937] __split_vma+0x170/0x950 [ 34.155419] split_vma+0xc6/0x110 [ 34.155854] mprotect_fixup+0x8d2/0xb30 [ 34.156357] do_mprotect_pkey+0x87e/0xd40 [ 34.156872] __x64_sys_mprotect+0x78/0xc0 [ 34.157386] do_syscall_64+0x3f/0x90 [ 34.157879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.158516] [ 34.158740] Freed by task 213: [ 34.159135] kasan_save_stack+0x22/0x50 [ 34.159656] kasan_set_track+0x25/0x30 [ 34.160170] kasan_save_free_info+0x2b/0x50 [ 34.160722] __kasan_slab_free+0x10a/0x190 [ 34.161275] kmem_cache_free+0x10d/0x4d0 [ 34.161802] rcu_core+0x8c8/0x2860 [ 34.162263] __do_softirq+0x1b7/0x7d4 [ 34.162761] [ 34.162981] Last potentially related work creation: [ 34.163618] kasan_save_stack+0x22/0x50 [ 34.164140] __kasan_record_aux_stack+0x8e/0xa0 [ 34.164733] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.165409] remove_vma+0x139/0x170 [ 34.165879] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.166462] do_vmi_munmap+0x1f1/0x2b0 [ 34.166969] __vm_munmap+0x138/0x3a0 [ 34.167470] __x64_sys_munmap+0x59/0x80 [ 34.167994] do_syscall_64+0x3f/0x90 [ 34.168493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.169158] [ 34.169380] The buggy address belongs to the object at ffff8880158bfbc8 [ 34.169380] which belongs to the cache vm_area_struct of size 168 [ 34.170921] The buggy address is located 88 bytes inside of [ 34.170921] freed 168-byte region [ffff8880158bfbc8, ffff8880158bfc70) [ 34.172407] [ 34.172638] The buggy address belongs to the physical page: [ 34.173333] page:000000008a18f9e9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x158bf [ 34.174468] memcg:ffff88800de44e01 [ 34.174915] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.175611] page_type: 0xffffffff() [ 34.176081] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.177048] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de44e01 [ 34.177996] page dumped because: kasan: bad access detected [ 34.178693] [ 34.178915] Memory state around the buggy address: [ 34.179525] ffff8880158bfb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.180419] ffff8880158bfb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.181312] >ffff8880158bfc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.182195] ^ [ 34.182750] ffff8880158bfc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.183671] ffff8880158bfd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.184560] ================================================================== [ 34.185649] Disabling lock debugging due to kernel taint [ 36.130971] BUG: Bad rss-counter state mm:000000001ba76635 type:MM_FILEPAGES val:33 [ 36.132103] BUG: Bad rss-counter state mm:000000001ba76635 type:MM_ANONPAGES val:22 [ 36.619895] BUG: Bad rss-counter state mm:0000000035763033 type:MM_FILEPAGES val:33 [ 36.620904] BUG: Bad rss-counter state mm:0000000035763033 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64191' (ECDSA) to the list of known hosts. 2023/06/20 05:50:04 fuzzer started 2023/06/20 05:50:05 dialing manager at localhost:44161 2023/06/20 05:50:05 checking machine... 2023/06/20 05:50:05 checking revisions... [ 37.392517] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:50:05 testing simple program... [ 37.442154] cgroup: Unknown subsys name 'net' [ 37.492578] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:50:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff86137cac RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff86137cb0 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020ed0 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09de0 R15=ffff88806ce09a70 RIP=ffffffff81131153 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f76467b4900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffd8c38a000 CR3=000000001b992000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fe8b3ec6000 CR3=00000000097fe000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=ae9bf81ac08903817544ebc4ffdd487f XMM02=ec2efd57dc4c00df000000000011e0e0 XMM03=0d33aa36fcac7108000000000011e1b0 XMM04=70d33fc40d07ca9a00000000000ae988 XMM05=19e9129bd510f2350000000000134ab8 XMM06=e1dfac83e4e2a9750000000000133920 XMM07=e042d86d42eb936e00000000001251b0 XMM08=0d33aa36fcac7108000000000011e1b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000